JPH049094B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotary crusher such as a hydraulic or spring type cone crusher or a secondary gear entry crusher.

[Conventional technology]

Conventionally, a rotary crusher is configured as shown in FIG. 5, for example.

In the figure, reference numeral 1 denotes an upper frame, which is connected to the upper part of a lower frame 2 placed on a pedestal (not shown). An inlet hopper 3 is provided at the top of the upper frame 1, which serves as an inlet for materials to be crushed (not shown) such as raw stones and rocks. A concave 4 in the shape of a truncated conical tube with a smoothly curved peripheral surface is attached.

On the other hand, as shown in FIG. 6, the boss 2a of the lower frame 2 has an eccentric shaft hole 5a (amount of eccentricity: e).
An eccentric sleeve 5 having a
The lower end of the main shaft 7 is inserted into the inner cylinder metal 6 in the shaft hole 5a.
The lower end of the main shaft 7 is supported by a lower bearing such as a thrust bearing (not shown) or the like. The upper end of the main shaft 7 is supported by an upper bearing 8 such as a radial bearing, and the upper bearing 8 is supported by a spider 9 attached to the upper frame 1. A truncated conical mantle 10, which together with the main shaft 7 constitutes a crushing head, is attached to the main shaft 7 via a mantle core 11. mantle 10
is a movable tooth for the concave 4, and a crushing chamber 1 is provided between the mantle 10 and the concave 4.
2 is formed.

On the other hand, a driven bevel gear 13 is attached to the lower end of the eccentric sleeve 5 through which the main shaft 7 is inserted, and a driving bevel gear 15 attached to the inner end of the horizontal rotating shaft 14 is meshed with the driven bevel gear 13. There is. The horizontal rotating shaft 14 is supported by a casing 16 attached to the lower frame 2 via a bearing 17, and an electric motor (both not shown) is connected to the outer end of the horizontal rotating shaft 14 via a V-belt. A V-pulley 18 is attached.

In order to crush objects to be crushed by the rotary crusher having the above configuration, the electric motor is activated to rotate the eccentric sleeve 5, and at the same time, the objects to be crushed are introduced from the inlet hopper 3. Due to the rotation of the eccentric sleeve 5, the main shaft 7
As the lower end of the mantle 10 moves eccentrically,
Similarly, the material to be crushed that has fallen into the crushing chamber 12 is rotated eccentrically, and the material to be crushed touches the inner peripheral surface of the concave 4 and the mantle 1.
The crushed product falls while being compressed and crushed due to the change in the gap with the outer circumferential surface of the crushing chamber 12, and is discharged from the lower part of the crushing chamber 12 to the outside of the machine through the discharge port (not shown) of the lower frame 2.

Therefore, the main shaft 7 of the rotary crusher rotates in different directions during no-load operation and during loaded operation.

That is, during no-load operation, the main shaft 7
As shown in the figure, the viscosity of the lubricating oil causes it to tangle with the eccentric sleeve 5, rotate in the same direction as the eccentric sleeve 5, and the number of rotations is not fixed. On the other hand, during load operation, as shown in FIG. The difference causes the rotation of the eccentric sleeve 5 in the direction opposite to the rotation direction (arrow indicated by the dotted line),
The rotational force has sufficient torque and is constant.

[Problem that the invention seeks to solve]

However, according to the above-mentioned conventional rotary crusher, the processing capacity depends on the weight of the material to be crushed, and when the mantle diameter is constant, the processing amount depends on the inclination angle of the mantle and the amount of rocking (eccentric throw). Compare to. Therefore, the following problems arise.

(1) If the inclination angle of the mantle is small, the amount of mantle oscillation must be increased.
Some parts may be difficult to manufacture, and depending on the nature of the material to be crushed, packing may occur during operation, resulting in instability.

(2) Processing capacity is limited because it depends on gravity, and it is extremely uneconomical in the case of crushed materials with low specific gravity or high porosity.

(3) The shape of the crushed material becomes flat and oblong, and it is necessary to use a separate machine to adjust the particle shape.

Therefore, even when the mantle and the inclination angle are small, the eccentric throw can be reduced without reducing processing capacity, and materials to be crushed with low specific gravity can be economically processed. It is also an object of the present invention to provide a rotary crusher that can improve the particle shape of crushed products.

[Means for solving problems]

In order to solve the above-mentioned problems, the rotary crusher of the present invention is provided with blades on the upper part of the outer periphery of the crushing head that are inclined toward the rear and lower side in the rotational direction of the crushing head during load operation.

[Effect]

The material to be crushed, which has been introduced into the crushing chamber, is sent downward by a blade that rotates together with the crushing head, is prevented from moving upward, and is brought into a compacted state.

〔Example〕

Examples of the rotary crusher of the present invention are shown in Figures 1 to 4.
This will be explained using figures. In the following description, the same components as those in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 1 is a cross-sectional view showing the main part of the first embodiment. The crushing chamber 12 in the first embodiment has an upper storage chamber 12a and a lower lower storage chamber 12a by forming a prominent step on the inner peripheral surface of the concave 4. It is divided into a crushing action chamber 12b. The upper part of the outer periphery of the mantle 10 facing the storage chamber 12a is provided so that it is inclined toward the rear lower side in the rotation direction of the crushing head during load operation, in other words, in the rotation direction of the main shaft 7 (so that the front side in the rotation direction is gradually higher). A plurality of vanes 20 (inclined) are provided.

In the first embodiment, a plurality of blades 20 rotating together with the crushing head move the crushed object M into the crushing chamber 12 and stored in the storage chamber 12a.
The material is fed into the crushing chamber 12b under a feeding action greater than the gravity acting on the material, resulting in a significant increase in throughput.

In addition, in a comparison test using an actual machine, the processing capacity was 1.6 times that of the conventional machine.

Furthermore, due to the feeding action of the blades 20, the objects M to be crushed in the crushing chamber 12b are effectively crushed by the eccentric rotation movement of the mantle 10 in a compacted state, and the objects M to be crushed are crushed by the mutual frictional action of the objects M to be crushed. Adjusted to a good grain shape.

Furthermore, since a feeding action greater than the action of gravity caused by the blades 20 is obtained, if the processing capacity is kept the same as before, the eccentric throw of the mantle 10 can be reduced, and as a result, the set-under of crushed products can be improved. I can do it.

In addition, by the feeding action of the blades 20, the material to be crushed M can be fed uniformly over the entire circumference of the crushing chamber 12, and uneven wear of the concave 4 and the mantle 10, which serve as tooth plates, can be reduced.

FIG. 2 is a sectional view showing the main part of the second embodiment, and the crushing chamber 12 in the second embodiment is provided in the same manner as in FIG. 5 by making the concave 4 into a truncated conical tube shape. . A plurality of blades 20 are provided on the upper part of the outer periphery of the mantle 10, as in the first embodiment, the blades 20 are inclined toward the rear and lower side in the direction of rotation of the mantle 10 during load operation.

Note that the operations and effects of the second embodiment are substantially the same as those of the first embodiment, so the explanation thereof will be omitted.

FIG. 3 is a cross-sectional view showing the main part of the third embodiment. The third embodiment shows a secondary engine entry lash with a concave 4 shaped like a truncated inverted conical tube, and its mantle. At the top of the outer periphery of 10, the first,
Similar to the second embodiment, a plurality of blades 2 are tilted backward and downward in the rotational direction of the crushing head during load operation.
0 is set.

The functions and effects of the third embodiment are almost the same as those of the first embodiment, so their explanation will be omitted.

FIG. 4 is a cross-sectional view showing the main part of the fourth embodiment. The fourth embodiment shows a Simons type cone crusher in which a concave 4 is supported by a spring so as to be movable up and down, and the crusher constitutes the crushing head. At the upper outer periphery of the mantle 10, there is a toothed part of the mantle 10.
A plurality of blades 20 are provided over the cylindrical portion 10a connected to the upper part of the crusher 10a, which are angled toward the rear and lower side in the rotational direction of the crushing head during load operation.

Note that the operations and effects of the fourth embodiment are substantially the same as those of the first embodiment, so the explanation thereof will be omitted.

Further, in each of the above embodiments, the number of blades 20 is a plurality of blades, but the blades 20 are not limited to this, but may be a single spiral blade that is angled backward and downward in the rotational direction of the crushing head during load operation, for example. . These feathers are
Of course, the outer diameter should be set to an appropriate value so as not to impede the introduction of the material to be crushed into the crushing chamber, and the angle of inclination of the blades should be selected at an appropriate angle that does not cause packing etc. depending on the properties of the material to be crushed. be done.

〔Effect of the invention〕

As described above, according to the rotary crusher of the present invention,
The following effects can be obtained compared to the conventional technology.

(1) The material to be crushed placed in the crushing chamber is crushed by the blades that rotate together with the crushing head that rotates during load operation.
Since the feeding action is greater than that of gravity, the throughput, that is, the throughput can be greatly improved.

(2) If the processing capacity is the same as in the past, the feeding action is greater than the gravitational action of the blades, so the eccentric throw of the manton can be reduced, and there are no parts that are difficult to manufacture as in the past. Therefore, it is possible to reduce the size of the machine.

(3) Since the eccentric throw of the malton can be reduced, the set-under of the product can be improved.

(4) Due to the feeding action of the blades, the material to be crushed is uniformly fed over the entire circumference of the crushing chamber, so uneven wear of the concave and mantle, which serve as tooth plates, can be reduced.

(5) The material to be crushed in the crushing chamber can be brought into a compacted state by the feeding action of the blades, so that frictional action occurs between the materials to be crushed and the particle shape of the crushed product can be improved.

[Brief explanation of drawings]

1 to 4 show embodiments of the rotary crusher of the present invention, and FIGS. 1, 2, 3, and 4 show the first embodiment, the second embodiment, and the rotary crusher of the present invention, respectively. 5 is a longitudinal sectional view of a conventional rotary crusher, and FIGS.
Each figure is an explanatory view of the operation of the main parts. 4... Concave, 7... Main shaft, 10... Mantle (teeth part), 10a... Cylindrical part, 12... Crushing chamber,
20... Feather.

Claims (1)

[Scope of Claims] 1. A rotary crusher characterized in that a blade is provided on the upper outer periphery of the crushing head and is inclined backward and downward in the rotational direction of the crushing head during load operation. 2. The rotary crusher according to claim 1, wherein the blades are formed in toothed portions. 3. The rotary crusher according to claim 1, wherein the blades are formed astride the tooth portion and the cylindrical portion. 4. The rotary crusher according to claim 1, wherein the blade is a single spiral blade. 5. The rotary crusher according to claim 1, wherein the blades include a plurality of blades equally spaced in the circumferential direction.